Henry monroe paine



(No Model.)

H. M. PAINB.

MAGNET ARMATURE No. 592,917. Patented Nov. 2,1897.

m mzm W7 M UNITED STATES PATENT OFFICE.

HENRY MONROE PAINE, OF AMHERST, MASSACHUSETTS, ASSIGNOR TO WILLIAM AP. REES, OF NEW YORK, N. Y.

MAG N ET-ARMATU RE.

SPECIFICATION forming part of Letters latent No. 592,917, dated November 2, 1897. Application filed April 20, 189 7. Serial No. 632,975. (No model.)

To all whom, it may concern.-

Be it known that I, HENRY MONROE PAINE, a citizen of the United States, and a resident of Amherst, county of Hampshire, and State of Massachusetts, have invented a new and useful Improvement in Magnet-Armatures, of which the following is a specification.

Experts in magnetic lines of force are aware that permanent magnets when not in use should be protected by an armature connecting their poles and that when the armature of a magnet of high potential is required to be removed from the magnetic poles great inconvenience is caused by the cohesion of magnet and armature; and the object of my invention is to provide an armature for permanent magnets that may be readily released from the magnets attractive potential. I attain this result by the mechanism illustrated in the accompanying drawings, in which- Figure 1 shows an armature in sections secured to a backing which holds them free from contact. Fig. 2 shows the sections secured as in Fig. 1 covered and joined by a lap hinged to the backing. Fig. 8 is a side view, partly in section, of the armature and lap connected with a lever, all in juxtaposition to the pole of a magnet.

Similar letters refer to similar parts throughout the several views.

Instead of the usual continuous bar of magnetic material connecting the magncts poles I form the armature in sections, but of like magnetic material and similar molecular structure, as shown at a a, Fig. 1. These sections are secured to a backing or frame 13 of non-magnetic material in such way as to leave a space 0 between the sections Ct at. A lap-piece f of like material and molecular structure to the sections a a is also hinged at e or otherwise connected with the backing B in such way as to cover or lap the space 0, as shown in Fig. 2.

In Fig. 3 I show the lap f open, free from contact with the sections a a, and I have connected a lever 02 with the lap f to illustrate one mechanical device for severing the contact of the lap f with the sections a a.

M is the pole of a magnet.

To obtain the best result the sections form in g the armature and the lap -piece should be of exactly the same structure and quality, and hence I would ordinarily cut the parts a a and f from the same bar of soft Wrought- 11'011.

If the armature formed in sections, as shown in Fig. 1, be presented to the magnets poles, it will be found that the magnets attractive potential is merely nominal as compared with the usual bar-armature, the continuity of which has not been broken; but if we lap the space 0, as shown in Fig. 2, by the lap-piece fcontinuity of the armature is practically restored and the armature will respond to the magnets attractive potential.

In Fig. 3 the lap fis seen open, free from contact with the sections a a, and consequently the armature does not respond to the magnets (m) attraction. If, however, the lap f is brought in contact with the sections a a covering the space a, continuity of the armature will be secured and the armature will attract the full potential of the magnet m. The armature so attracted can be removed from the magnet as a whole only by a force exactly equaled by the potential of the magnet. As, however, the least rupture of contact of the lap f with the sections a a destroys the continuity of the armature, it will be found that a less force will effect this result, and in the case shown in Fig. 3 a slight pressure on the lever 72 will release the armature from the magnets poles.

Having thus described my invention, What I claim, and desire to secure by Letters Patout, is-

1. An armature in sections or separated parts in combination with a lap joining the sections, substantially as described.

2. A non-magnetic frame or backing B, holding the sections a, a, free from contact in combination with a movable lap f, substantially as described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 9th day of April,

HENRY MONROE FAINE.

Witnesses:

HENRY W. HASKINS, Foansrnn P. AINSWORTH. 

